<?php
$sum=$_GET['sum'];
$url="http://merchant.roboxchange.com/WebService/Service.asmx/CalcOutSumm?MerchantLogin=falcon007&IncCurrLabel=WMZM&IncSum=$sum";
$data=file_get_contents($url);
$data=explode("<OutSum>",$data);
$data=explode("</OutSum>",$data[1]);
$data=$data[0];
echo $data;

?>